’70 Kickdown bracket hits the firewall

I have a 670 cfm Holley on Edelbrock CH4B on top of a rebuilt 440.
The kickdown bracket, which I bought from eBay, is supposed to be correct for a C-body. But it hits the firewall, and leaves about 5 mm gap btw the carb pin and the rear of the slot. - AFAIK the pin is supposed to meet the bottom of the slot.

Were there different kickdown linkages on different size engines on the C-bodies?
Better still, would someone have measurements of the correct 69/70 440 linkage?
Author: 330dTA